Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 316: | \[{20^{316}-1\over19}\] | 3 × 7 × 317 × 401 × 26861 × 7731160503875069<16> × 4178614725165165091<19> × 52283868973702536169<20> × 7012116809755762514267308698568975988864311<43> × 287839480860625993977660952380952380952380952380952380952380952380952380952380952380952380952380952381<102> × 287432372800432459506534301611169831662156230672530031388405956717040207053344556589598558808027250485772949330144669871063665756743787219648040781327438501537953224195032922425796706970743488282448453<201> |